# US 9,002,325 B2 · Method of communicating between different electronic entities > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,002,325 B2 - Document ID: US9002325B2 - Status: Granted - Kind: B2 - Application number: 10/550,011 - Filed: 2004-03-09 - Published: 2006-10-12 - Granted: 2015-04-07 - Earliest claimed: 2003-03-17 - Assignees: Oberthur Technologies - Applicants: Gilles Dumortier - Inventors: Gilles Dumortier - Web page: https://patentgrep.com/patent/US9002325B2 ## CPC - G06K 7/10128: {the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device} - G06K 7/0008: {General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer} - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS ## Abstract A method of communicating between at least two electronic entities (121, 122, 123), involves a communication management unit (10) which uses a command/response protocol in order to communicate with the electronic entities (121, 122, 123). At least one of the aforementioned electronic entities (121, 122) communicates with the communication management unit (10) using wireless technology. The communication method includes a step consisting in saving a list of electronic entities in the communication management unit (10). The method can be used for microcircuit cards. ## Claims ### Claim 1 A method of communicating between at least two electronic entities having contactless communication means, said method comprising: using a communication management unit to control at least part of a process of communication between said electronic entities, said communication management unit (LPU) employing a command-response protocol using said contactless communication means to communicate with said electronic entities upon said electronic entities being within a radius of action of said communication management unit; storing in said communication management unit a list of said electronic entities that are within the radius of action of said communication management unit; and querying each of the electronic entities to determine if any of the electronic entities has a message to be sent to an other of said electronic entities; and for each electronic entity of said list, sending an interrogation message from said communication management unit to the electronic entity, in order to determine if the electronic entity has a message to be sent to another of said electronic entities, a determination being positive upon receiving, in response to the interrogation message, said message to be sent to said other electronic entity, otherwise said determination being negative, where, in the case of a positive determination, storing a received message in a mailbox of said communication management unit that is assigned to said electronic entity or to said other electronic entity, and where in the case of a negative determination, if no acknowledgment from the electronic entity is received in response to the interrogation message thereby showing that the electronic entity is no longer within said radius of action, removing the electronic entity from said list of electronic entities, wherein, when said list includes a new electronic entity, a mailbox is created in the communication management unit, said mailbox being adapted to receive and store messages sent to or by said new electronic entity. ### Claim 2 (depends on 1) The method according to claim 1, wherein said electronic entities constitute a network of acquaintances. ### Claim 3 (depends on 2) The method according to claim 2, wherein, upon said list including a new electronic entity, the method further comprising a step of adding the new electronic entity to said network of acquaintances as a function of at least one predetermined criterion. ### Claim 4 (depends on 1) The method according to claim 1, wherein each of said electronic entities is associated with a unique identifier. ### Claim 5 (depends on 4) The method according to claim 4, wherein each identifier is associated with a service or family code. ### Claim 6 (depends on 1) The method according to claim 1, wherein at least one of said electronic entities is secure. ### Claim 7 (depends on 1) The method according to claim 1, wherein at least one of said electronic entities is a loyalty card. ### Claim 8 (depends on 1) The method according to claim 1, wherein at least one of said electronic entities is a payment card. ### Claim 9 (depends on 1) The method according to claim 1, wherein the method ensures continuity of communication involving one of said electronic entities and an antenna from a plurality of antennas connected to the communication management means when said electronic entity moves in such a manner that said communication involves another antenna from said plurality of antennas. ### Claim 10 (depends on 1) The method according to claim 1, wherein said list of said electronic entities includes a list of all of said electronic entities separate from a list of said electronic entities in communication with other said electronic entities. ### Claim 11 (depends on 1) The method according to claim 1, wherein one of the electronic entities is a proximity card with a 10 cm range and that complies with ISO/IEC standard 14443, and an other one of the electronic entities is a vicinity card with a 70 cm range and that complies with ISO/IEC standard 15693. ### Claim 12 (depends on 1) The method according to claim 1, wherein at least one of said electronic entities is a contactless microcircuit card. ### Claim 13 (depends on 1) The method according to claim 1, wherein said electronic entities include said other of the electronic entities and a sender entity, and wherein said message is sent from the sender entity. ### Claim 14 (depends on 1) The method according to claim 1, further comprising: upon contacting said other of the electronic entities intended to receive the message, sending the message to said other of the electronic entities. ### Claim 15 A communication system, comprising: at least two electronic entities having contactless communication; and further comprising: employing a command-response protocol to communicate with said electronic entities using said contactless communication upon said electronic entities being within a radius of action of said communication management unit, said communication management unit having stored therein a list of said electronic entities that are within the radius of action of a communication management unit, wherein at least one of said electronic entities communicates with said communication management unit using said contactless communication, wherein said communication management unit is configured to, for each electronic entity of said list, send an interrogation message to the electronic entity in order to determine if the electronic entity has a message to be sent to another of said electronic entities, a determination being positive upon receiving, in response to the interrogation message, said message to be sent to said other electronic entity, otherwise said determination being negative, where, in the case of a positive determination, the communication management unit stores a received message in a mailbox of said communication management unit that is assigned to said electronic entity or to said other electronic entity, and where in the case of a negative determination, if no acknowledgment from the electronic entity is received in response to the interrogation message thereby showing that the electronic entity is no longer within said radius of action, the communication management unit removes the electronic entity from said list of electronic entities, and when said list includes a new electronic entity that is configured to exchange messages with at least one of the electronic entities, creating a new mailbox, said new mailbox configured to receive and store messages sent to or by said new electronic entity. ### Claim 16 (depends on 15) The communication system according to claim 15, wherein one of the electronic entities is a proximity card with a 10 cm range and that complies with ISO/IEC standard 14443, and an other one of the electronic entities is a vicinity card with a 70 cm range and that complies with ISO/IEC standard 15693. ### Claim 17 (depends on 15) The communication system according to claim 15, wherein said communication management unit further includes means for sending the message to said addressee entity upon a determination that said addressee entity can be contacted.